How do I get my ATI Radeon 4850X2 card to display on four monitors?
When using the ATI Radeon 4850X2 card, with 4 monitors plugged in, only 2 are showing a display.
This issue is caused by Crossfire being turned on, which only allows 2 monitors to display. To disable Crossfire, first make sure that your ATI drivers are up to date, and that you have the Catalyst software installed. Make sure that the Catalyst Control Panel is in advanced mode, and search for the Crossfire tab toward the bottom of the list. Select it, and uncheck the box that says "Enable Crossfire" After that, go in to your Display Properties section, select to enable the monitors and to extend the Windows desktop to these monitors. If the monitors still won't enable after Crossfire is disabled, it may indicate a problem with the card itself.
Keywords: ATI, Radeon, 4850X2, Catalyst, 4 monitors, Quad, Crossfire